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| author | Jose E. Marchesi <jose.marchesi@oracle.com> | 2016-09-19 05:19:14 -0700 |
|---|---|---|
| committer | Jose E. Marchesi <jose.marchesi@oracle.com> | 2016-09-19 05:19:14 -0700 |
| commit | b19753ce31da347605dfa903c6fd2158e2444f0d (patch) | |
| tree | 750a5c9a267cf7bc7967b10ca87e5cae66ad99db /gdb/main.c | |
| parent | 2387dd904938566f5d1d6df6670b5dec9dd3f463 (diff) | |
| download | gdb-b19753ce31da347605dfa903c6fd2158e2444f0d.zip gdb-b19753ce31da347605dfa903c6fd2158e2444f0d.tar.gz gdb-b19753ce31da347605dfa903c6fd2158e2444f0d.tar.bz2 | |
bfd: allow negative offsets to _GLOBAL_OFFSET_TABLE_ in elf64 SPARC
The code compiled with the -fpic model in SPARC uses 13-bit signed
immediate PC-relative loads to fetch entries from the GOT table. In
theory this would allow using a GOT table (.got section) containing up
to 1024 entries in elf32 or 512 entries in elf64.
However, in elf64 sparc GNU targets _GLOBAL_OFFSET_TABLE_ is always
placed at the beginning of the .got section, making it impossible to use
negative offsets. This limits the usage of -fpic to GOT tables
containing a maximum of 257 entries in elf64.
This patch activates an optimization that is already used in sparc-elf32
also in sparc-elf64, that sets _GLOBAL_OFFSET_TABLE_ to point 0x1000
into the .got section if the section size is bigger than 0x1000.
2016-09-19 Jose E. Marchesi <jose.marchesi@oracle.com>
* elfxx-sparc.c (_bfd_sparc_elf_size_dynamic_sections): Allow
negative offsets to _GLOBAL_OFFSET_TABLE_ if the .got section is
bigger than 0x1000 bytes.
Diffstat (limited to 'gdb/main.c')
0 files changed, 0 insertions, 0 deletions